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High-voltage electric field low-temperature plasma cold sterilization device

A low-temperature plasma and high-voltage electric field technology, applied in the fields of food electrical processing, food science, food preservation, etc., can solve the problem of not being able to drive capacitive loads, but only carrying inductive loads, etc. Suppression and output voltage stabilization effect

Active Publication Date: 2021-03-02
NANJING SUMAN PLASMA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the shortcomings of the prior art that the frequency converter can only carry inductive loads but cannot drive capacitive loads, and provides a high-voltage electric field low-temperature plasma cold sterilization device. The larger transformer is arranged at the rear of the shell The small single-phase inverter, the first-stage inductance, the electric voltage regulator, the second-stage inductance, the AC contactor and the solid-state relay are located in the front of the shell, which is convenient for installation and disassembly, and is also convenient for observing the work of each structure Situation: The frequency converter is externally connected with the first-stage inductance, so that the clutter of the power supply and high-frequency high-order harmonics are effectively filtered out, which solves the problem that the frequency converter and the voltage regulator are directly connected to the load, causing the frequency converter and the voltage regulation module to be burned. At the same time, the high-order harmonics fed back during the drive plasma discharge process can also be filtered out to ensure the stable operation of the overall circuit; the second-stage inductor is connected after the voltage regulator, which solves the problem of avoiding the circuit when the voltage regulation changes. Due to the negative resistance effect generated during the plasma discharge process, the output voltage is more stable, and the system can run reliably for a long time

Method used

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  • High-voltage electric field low-temperature plasma cold sterilization device
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Examples

Experimental program
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Effect test

Embodiment 1

[0040] Please combine figure 2 , figure 2 It is a block diagram of a high-voltage electric field low-temperature plasma cold sterilization device of the present invention.

[0041] A high-voltage electric field low-temperature plasma cold sterilization device, including a housing 500 and a power module 100 inside the housing 500 for outputting harmonic current, a voltage regulation module 200 for adjusting load voltage, current and power, and a circuit for adjusting The switch module 300 in the open and closed state and the power supply module 400 generating high voltage.

[0042] The housing 500 includes four walls, namely a bottom panel 510 , a left side panel 520 , a right side panel 530 and a rear panel 540 . Wherein, on the left side plate 520 and the right side plate 530, there are cooling holes respectively, preferably two cooling holes respectively, the two cooling holes are horizontally arranged side by side, one is close to the back panel 540, and the other is aw...

Embodiment 2

[0064] Please combine Figure 4 and Figure 5 , the high-voltage electric field low-temperature plasma cold sterilization device of this embodiment has the same basic structure as that of Embodiment 1, and the improvements are as follows:

[0065] The power module 100 includes a three-phase inverter 130. The three-phase inverter 130 includes three input terminals connected to a three-phase power supply (such as AC380). The output terminal T1 of the three-phase inverter 130 is connected to one end of the first-stage inductor 120. The other end of the primary inductor 120 is connected to the voltage regulation module 200 ; the output terminal T3 of the three-phase inverter 130 is connected to the voltage regulation module 200 . According to needs, a capacitor can also be connected in parallel between the two output terminals T1 and T3 of the three-phase inverter 130 to enhance the filtering effect.

[0066] recombine Figure 4 , the voltage regulation module 200 includes an e...

Embodiment 3

[0070] combine image 3 and Figure 4 , using the high-voltage electric field low-temperature plasma cold sterilization device of embodiment 1 or embodiment 2, the working principle of this embodiment is:

[0071] The single-phase alternating current is input to the power input end of the single-phase inverter 110 ; or the three-phase alternating current is input to the power input end of the three-phase inverter 130 . The single-phase inverter 110 or the three-phase inverter 130 outputs PWM sinusoidal pulse width modulation waves of single-phase AC. The harmonics are filtered and effectively suppressed, and the frequency spectrum is broadened, so that the harmonic current entering the primary coil of the electric voltage regulator 210 is stabilized, reducing the heat loss and burning of the electric voltage regulator 210 coil, and making the frequency converter as the electric voltage regulator 210 input power is achieved. The use of three-phase inverters can be applied to...

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Abstract

The invention discloses a high-voltage electric field low-temperature plasma cold sterilization device, and belongs to the technical field of frequency converter power supply circuits. According to the high-voltage electric field low-temperature plasma cold sterilization device, a frequency converter, a first-stage inductor, an electric voltage regulator, an alternating-current contactor and a solid-state relay are arranged on the front portion in a shell, a transformer is arranged on the rear portion of the shell, the transformer with a large size is arranged on the inner side of the shell, and the frequency converter, the first-stage inductor, the electric voltage regulator, a second-stage inductor, the alternating current contactor and the solid-state relay which are small in size are located on the outer side of the shell, so that mounting and dismounting are convenient, and the working conditions of all structures can be observed conveniently. The frequency converter is externallyconnected with the first-stage inductor, so that the output voltage is controllable, harmonic components in modulation waves are suppressed, the frequency spectrum is expanded, and the harmonic current entering a voltage regulation module is stable.

Description

technical field [0001] The invention relates to the technical field of frequency converter power circuits, and more specifically relates to a high-voltage electric field low-temperature plasma cold sterilization device. Background technique [0002] Plasma is the fourth state of matter. It consists of an ionized conductive gas, which includes six typical particles, namely electrons, positive ions, negative ions, atoms or molecules in an excited state, atoms or molecules in a ground state, and photons. [0003] The ions, electrons, excited atoms, molecules and free radicals enriched in the low-temperature plasma space are all active particles, which are easy to react with the material surface. Therefore, it is widely used in sterilization, surface modification, thin film deposition, etching processing, device cleaning and other fields. [0004] High-voltage electric field low-temperature plasma cold sterilization is a new type of food cold sterilization technology in the wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/015A23L3/32
CPCA23L3/0155A23L3/32A23V2002/00A23V2300/12A61L2/14A61L2/26A61L2202/24
Inventor 万良淏姚俊徐龙万京林
Owner NANJING SUMAN PLASMA TECH CO LTD
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